I recommend below ConfigMgr Reports to be familiar and these might be useful in day to day operations Asset Intelligence:- License 03A – Count of licenses by license status
Hardware 07A – USB devices by manufacturer 
Software 02C – Software by Category and Family 
Software 01A – Summary of installed software in a specific collection This report provides a summary of installed software ordered by the number of instances found from inventory. 
Desired Configuration Management – Compliance Summary compliance for a collection by computer Hardware Count physical disk configurations Computers with low free disk space (less than specified MB free) Computers with low free disk space (less than specified % free) Count memory configurations Computers with low memory (less than or equal to specified MB) Computers with a specific amount of memory Memory information for a specific computer Network Count IP addresses by subnet IP – Information for a specific computer NAP List of NAP-capable and NAP-upgradable computers List of Network Access Protection policies Operating System Windows Server computers Computers with a specific operating system and service pack Computers with a specific operating system Count operating systems and service packs Count operating system versions Services – Computers running a specific service
SMS/SCCM Client Count SMS client versions Servers with no client Installed Client Deployment Failure Report Client Deployment Success Report Client Deployment Status Details Client Assignment Failure Details Count clients assigned and installed for each site Computers with a specific SMS client version Count clients for each site Computers with duplicate MAC addresses Computers that may share the same SMS Unique ID Clients that have not reported recently (Collection) & Clients that have not reported recently (in a specified number of days) 
Site TO Site Reports: Sites by hierarchy with time of last site status update 
Computers in a specific site
Status messages for a branch distribution point
Site system roles and servers for a specific site Software Inventory Software registered in Add Remove Programs for a specific collection
Computers with specific software registered in Add Remove Programs
Computers with a specific product
Count of all instances of software registered with Add or Remove Programs
Computers with a specific product name and version
Count computers with a specific filename Software Distribution:- Status of a specific advertisement
All advertisements for a specific collection
All advertisements
Distribution status of a specific package
All packages on a specific distribution point
All distribution points
All active package distributions 
Patching:- Compliance 1 – Overall Compliance
Compliance 4 – Deployment (per update)
Compliance 3 – Update list (per update)
Compliance 4 – Deployment (per update)
Management 1 – Updates required but not deployed
Management 2 – Updates in a deployment
States 1 – Enforcement states for a deployment
States 2 – Evaluation states for a deployment
Scan 1 – Last scan states by collection
Scan 2 – Last scan states by site Auditing All audit messages for a specific user
All Task Sequence Advertisements
Deployment status of all task sequence advertisements
Progress of a running task sequence
Progress of OS deployment task sequences
Status of all unknown computers
Computers for a specific user name
WOL All sites that are enabled for Wake On LAN
All computers targeted for Wake On LAN activity
All objects pending wake-up activitiy Customized reports: All computers based on AD site: SELECT DISTINCT SYS.Name0,SYS.AD_Site_Name0, SYS.User_Domain0,SYS.User_Name0, SYS.Operating_System_Name_and0 FROM v_R_System SYS WHERE SYS.AD_Site_Name0 LIKE @variable ORDER BY SYS.AD_Site_Name0, SYS.Name0 –Prompt Query 
SELECT DISTINCT SYS.Name0,SYS.AD_Site_Name0, SYS.User_Domain0,SYS.User_Name0, SYS.Operating_System_Name_and0 FROM v_R_System SYS WHERE SYS.AD_Site_Name0 LIKE @variable ORDER BY SYS.AD_Site_Name0, SYS.Name0 Lins with reports =è Hardware – General – Computer information for a specific computer; below is the screenshot 
Also I prefer one to have below custom reports Compliance – Detailed list – specific collection Computer Information – specific collection Computer information for a collection of computers Computers with specific software Distribution Points in All DP Group Missing Patches Network settings Network settings for a specific collection Servers with SCCM Client version
All Workstation Patching compliance reports
All Desktops & Laptops model & make reports
